Learn Java for Web Development

176 CHAPTER 4: Building a Web Application Using Struts 2

You need to configure the servlet filter in the deployment descriptor, as illustrated in Listing 4-16.

Listing 4-16. web.xml

1.<!DOCTYPE web-app PUBLIC

2. "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"


3. "http://java.sun.com/dtd/web-app_2_3.dtd" >


4. 
   

   5.
   6.Hello World Struts2 Web App
   7.
   8.struts2
   9.org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
   10.

   
   


5. 
   

   12.
   13.struts2
   14./*
   15.
   16.

   
   

   Lines 7 to 10: These lines define the StrutsPrepareAndExecuteFilter that is used

as the servlet filter in Struts 2 to which all URLs are mapped.

Note The FilterDispatcher (org.apache.struts2.dispatcher.FilterDispatcher) was used

in early Struts 2 development, and it has been deprecated since Struts 2.1.3.

Listing 4-17 illustrates the struts.xml file.

Listing 4-17. struts.xml

1.<?xml version="1.0" encoding="UTF-8"?>
2.<!DOCTYPE struts PUBLIC

3. "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"


4. "http://struts.apache.org/dtds/struts-2.0.dtd">


5. 
   

   6.
   7.
   8.
   9.
   10./index.jsp
   11.
   12.
   13.

   
   

   Lines 9 to 11: These lines define the index action, which renders the result

index.jsp.